EP0561449B1 - Ceramic burner for a hot-blast stove of a blast furnace - Google Patents

Ceramic burner for a hot-blast stove of a blast furnace Download PDF

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Publication number
EP0561449B1
EP0561449B1 EP93200661A EP93200661A EP0561449B1 EP 0561449 B1 EP0561449 B1 EP 0561449B1 EP 93200661 A EP93200661 A EP 93200661A EP 93200661 A EP93200661 A EP 93200661A EP 0561449 B1 EP0561449 B1 EP 0561449B1
Authority
EP
European Patent Office
Prior art keywords
burner
duct
gas
central
ceramic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP93200661A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0561449A2 (en
EP0561449A3 (en
Inventor
Jacobus Van Laar
August Hugo Hendriks
Rudolf Boonacker
Johannes Cornelis Antoin Van Den Bemt
Jean-Pierre André Westerveld
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tata Steel Ijmuiden BV
Original Assignee
Hoogovens Groep BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hoogovens Groep BV filed Critical Hoogovens Groep BV
Publication of EP0561449A2 publication Critical patent/EP0561449A2/en
Publication of EP0561449A3 publication Critical patent/EP0561449A3/en
Application granted granted Critical
Publication of EP0561449B1 publication Critical patent/EP0561449B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B9/00—Stoves for heating the blast in blast furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
    • F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/21—Burners specially adapted for a particular use
    • F23D2900/21001—Burners specially adapted for a particular use for use in blast furnaces

Definitions

  • the invention relates to a ceramic gas burner for a hot-blast stove of a blast furnace.
  • a ceramic gas burner for a hot-blast stove of a blast furnace.
  • a burner has central gas duct that opens into a central zone of a burner crown and side air ducts on both sides of the gas duct which also open in the central zone.
  • the invention also relates to a method for operating such a ceramic burner.
  • Hot blast stoves which act as regenerative heat exchangers for the heating of blast air for a blast furnace, are well known.
  • a burner as described above is known from European patent specification EP-A-0306072.
  • EP-A-0306072 European patent specification
  • the relative positioning of the outflow openings of the gas and air ducts, together with recesses formed by grooves in the long sides of the outflow openings, is intended to lower the point where the mixing turbulence is complete. This has a positive effect on the stability of the flame as well as the uniformity and completeness of the combustion of the combustion gas.
  • the degree of completeness of combustion is dependent on the height above the burner at which maximum burn-out is achieved, that is to say that maximum burn-out is only achieved at a specific height above the burner.
  • the trend of the burn-out as a function of the height above the burner may be imagined as a rising curve which approaches the maximum burn-out asymptotically.
  • An object of the invention is to improve combustion characteristics, in particular it is sought that the curve of the relationship of burn-out and height above burner, becomes steeper; in other words it is desired that the maximum burn-out is to be attained at a lower height above the burner or that a higher degree of burn-out of the combustion gas is to be attained at the same height above the burner.
  • a ceramic gas burner for a hot blast stove having a burner crown and gas and air ducts having respective discharge openings at said burner crown, said gas and air ducts comprising a central gas duct; at least two side air ducts which have their said discharge openings at respectively opposite sides of said discharge opening of said central gas duct; and at least one central air duct having at least one said discharge opening within said central gas duct as seen in plan view.
  • the central gas duct extends vertically upwardly to its discharge opening, within the central gas duct.
  • the central air duct opens into central zone of the burner crown, at which the central gas duct and the side air ducts also open.
  • the central air duct provides a T-shape flow path for air, having an upwardly extending leg portion of the T-shape and at the top thereof arm portions of the T-shape extending laterally in opposite directions to respective discharge openings.
  • doubled air mixing we refer to the extra mixing effect of the supply of air centrally within the gas duct.
  • the central air duct has a structure comprising an upwardly extending portion and at the top thereof a top portion projecting laterally in an overhanging manner at both of opposite sides of the upwardly extending portion, the top portion having opposite side faces at which the discharge openings of the central air duct are located.
  • This top portion may thus project into the gas flow at a right angle. This achieves the effect that mixing is intensified still further because the gas eddies against and along the overhanging parts of the central air duct, which may deliberately not be streamlined, which again improves the effect of the doubled air mixing.
  • the central gas duct has an upwardly widening region at the said burner crown, the discharge opening or openings of the central air duct being located at the height of the lower end of the upwardly widening region. This can achieve the result that the mixing effects are enhanced yet further.
  • the side air ducts each have a plurality of discharge openings arranged in respective rows on opposite sides of the central gas duct, and as seen in plan view the central air duct has a plurality of discharge openings which are laterally directed and are arranged at locations which, in the longitudinal directions of the rows of the discharge openings of the side air ducts, are staggered relative to the locations of the discharge openings of the side air ducts. This is believed to make the mixing between gas and air still more intensive.
  • An effective structure of the ceramic burner in accordance with the invention is achieved when the burner has a structure comprising opposite outer side walls which bound the side air ducts and partition walls which separate the side air ducts from the central gas duct, and the burner crown has a structure which rests upon the side walls and the partition walls, there being cooperating tongue-and-groove constructions in the side walls and the partition walls on the one hand and the structure of the burner crown on the other hand, so as to locate the structure of the burner crown horizontally. This achieves the effect that the said partition wall is restrained from any inward movement without the flow being disturbed in the central zone.
  • a particular advantage is achieved with the burner in accordance with the invention if the burner is at least partly made of mould-cast concrete. This has been found to enable a considerable saving in construction costs.
  • the invention is also embodied in a method for operating the ceramic burner described above. Particularly, it is preferred that, of the total quantity of air supplied, 10%-20% is supplied via the central air duct, and the balance via the side air ducts on both sides of the central gas duct.
  • the horizontal axis represents the height above the burner and the vertical axis represents the burn-out as a percentage of complete combustion.
  • Curve 1 represents the burn-out characteristic of the known burner of EP-A-0306072; curve 2 represents that of the illustrated burner in accordance with the invention. Because of the "double" air mixing achieved in the burner of the invention, the maximum burn-out attained is higher (closer to 100%) and a higher burn-out degree is attained at a lower height above the burner.
  • the CO content of the combusted gases which can be achieved with the known burner at a maximum burn-out is of the order of magnitude of 5,000 ppm CO. With the illustrated burner in accordance with the invention this fraction may be reduced to approximately 100 ppm CO.
  • FIGS 2 and 3 show the burner embodying the invention.
  • the burner has a central gas duct 7 which opens at the central zone 9 of the burner crown.
  • Side air ducts 8 each have a row of outlet openings 6, on opposite sides of the central gas duct 7.
  • the gas comes upwards through the gaps 5.
  • the outlets 4 are positioned between the respective openings 6 along each row of the latter i.e. the openings 4 and the openings 6 have staggered relative positions.
  • the burner body 13 and the partition walls 11 may be cast from a refractory concrete.
  • the central air duct 3 is composed, in this example, of steel sections which have their outer edges bedded in concrete and their inner edges supply the central air flow.
  • a T-shaped beam may, for example, be fitted on the top of the vertical part of the central air duct.
  • the burner crown elements 10 consist of, in this example, three layers laid on top of each other. These elements have been pre-cast in a refractory concrete in moulds.
  • a combustible gas is supplied to the gas duct 7 and the combustion air needed for combustion is supplied to the ducts 3 and 8, preferably in a proportion of 10% to 20% in the ducts 3 and 90% to 80% in the side ducts 8. Due to the fast and complete mixing the burner makes it possible, to reduce the height of the combustion chamber and to improve the burn-out of the combustion gas. With an air excess of 10% relative to the stoichiometrically required amount of air, the enhanced air mixing can reduce emission of CO by a factor of 50.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)
EP93200661A 1992-03-16 1993-03-08 Ceramic burner for a hot-blast stove of a blast furnace Expired - Lifetime EP0561449B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL9200486A NL9200486A (nl) 1992-03-16 1992-03-16 Keramische brander voor een brandschacht van een windverhitter van een hoogoven.
NL9200486 1992-03-16

Publications (3)

Publication Number Publication Date
EP0561449A2 EP0561449A2 (en) 1993-09-22
EP0561449A3 EP0561449A3 (en) 1993-11-18
EP0561449B1 true EP0561449B1 (en) 1995-07-19

Family

ID=19860562

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93200661A Expired - Lifetime EP0561449B1 (en) 1992-03-16 1993-03-08 Ceramic burner for a hot-blast stove of a blast furnace

Country Status (16)

Country Link
US (1) US5433599A (es)
EP (1) EP0561449B1 (es)
CN (1) CN1029565C (es)
AU (1) AU661893B2 (es)
BR (1) BR9301176A (es)
CA (1) CA2091116C (es)
CZ (1) CZ288746B6 (es)
DE (1) DE69300272T2 (es)
ES (1) ES2074911T3 (es)
FI (1) FI100339B (es)
MX (1) MX9301384A (es)
NL (1) NL9200486A (es)
PL (1) PL170595B1 (es)
RU (1) RU2092739C1 (es)
SK (1) SK19393A3 (es)
ZA (1) ZA931718B (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011056069A2 (en) 2009-11-04 2011-05-12 Heatteq Refractory Holding B.V. Method for improving the combustion efficiency of a burner of a hot blast stove, and such a hot blast stove comprising a gas burner

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4409775C2 (de) * 1994-03-22 1996-02-08 Didier Werke Ag Brenner
EP1990575A1 (en) * 2007-05-07 2008-11-12 Paul Wurth Refractory & Engineering GmbH Ceramic burner
ES2582863T3 (es) * 2010-02-12 2016-09-15 Allied Mineral Products, Inc. Cúpula de estufa cowper y estufa cowper
JP4955117B1 (ja) 2011-03-15 2012-06-20 新日鉄エンジニアリング株式会社 炉頂燃焼式熱風炉
JP4892107B1 (ja) * 2011-03-23 2012-03-07 新日鉄エンジニアリング株式会社 炉頂燃焼式熱風炉
CN102537957B (zh) * 2012-01-20 2014-11-26 何富有 一种新型燃气炉具头
CN107152680B (zh) * 2017-05-27 2018-07-31 鲁西化工集团股份有限公司 一种惰性热风发生器燃烧器和循环风加热器

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1754603A (en) * 1928-05-28 1930-04-15 Charles J Brown Furnace gas burner
US2049150A (en) * 1932-03-12 1936-07-28 Texas Gulf Sulphur Co Fuel burner
US3044539A (en) * 1958-12-11 1962-07-17 Eclipse Fuel Eng Co Process of combustion
DE2536073A1 (de) * 1973-06-15 1976-03-25 O F R Officine Fratelli Riello Brennerkopf, insbesondere fuer gasfoermige brennstoffe
US4217088A (en) * 1977-03-28 1980-08-12 John Zink Company Burner for very low pressure gases
SU723299A1 (ru) * 1978-08-10 1980-03-25 Научно-производственное объединение по технологии машиностроения ЦНИИТМАШ Горелка
DE2908427C2 (de) * 1979-03-05 1983-04-14 L. & C. Steinmüller GmbH, 5270 Gummersbach Verfahren zur Verminderung der NO↓X↓-Emission bei der Verbrennung von stickstoffhaltigen Brennstoffen
US4402666A (en) * 1980-12-09 1983-09-06 John Zink Company Forced draft radiant wall fuel burner
DE3240852A1 (de) * 1982-11-05 1984-05-10 Didier-Werke Ag, 6200 Wiesbaden Keramischer brenner
US4642047A (en) * 1984-08-17 1987-02-10 American Combustion, Inc. Method and apparatus for flame generation and utilization of the combustion products for heating, melting and refining
US4946475A (en) * 1985-04-16 1990-08-07 The Dow Chemical Company Apparatus for use with pressurized reactors
CN1007920B (zh) * 1985-07-15 1990-05-09 美国氧化公司 烃类流体燃料燃烧、控制方法及装置
NL8702037A (nl) * 1987-08-31 1989-03-16 Hoogovens Groep Bv Keramische brander voor een windverhitter.
NL8702036A (nl) * 1987-08-31 1989-03-16 Hoogovens Groep Bv Keramische brander voor gas voor een brandschacht van een windverhitter van een hoogoven.
DE3735002A1 (de) * 1987-10-16 1989-04-27 Metallgesellschaft Ag Verfahren zum entfernen von schwefelwasserstoff aus abgas
JP3047996B2 (ja) * 1990-12-18 2000-06-05 東京電力株式会社 石炭ガス化バーナ

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011056069A2 (en) 2009-11-04 2011-05-12 Heatteq Refractory Holding B.V. Method for improving the combustion efficiency of a burner of a hot blast stove, and such a hot blast stove comprising a gas burner

Also Published As

Publication number Publication date
ZA931718B (en) 1993-09-30
NL9200486A (nl) 1993-10-18
SK19393A3 (en) 1993-10-06
EP0561449A2 (en) 1993-09-22
PL170595B1 (pl) 1997-01-31
CA2091116A1 (en) 1993-09-17
ES2074911T3 (es) 1995-09-16
CN1076490A (zh) 1993-09-22
US5433599A (en) 1995-07-18
DE69300272T2 (de) 1996-01-04
MX9301384A (es) 1993-09-01
FI100339B (fi) 1997-11-14
FI931141A0 (fi) 1993-03-15
AU661893B2 (en) 1995-08-10
DE69300272D1 (de) 1995-08-24
BR9301176A (pt) 1993-09-21
EP0561449A3 (en) 1993-11-18
PL298090A1 (en) 1993-10-18
RU2092739C1 (ru) 1997-10-10
FI931141A (fi) 1993-09-17
AU3406393A (en) 1993-09-23
CZ38593A3 (en) 1993-11-17
CZ288746B6 (cs) 2001-08-15
CA2091116C (en) 2000-06-06
CN1029565C (zh) 1995-08-23

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